Improved iut-squaring chuck



H.Y F. WHEELER.

Dressing Metal Nuts.

- Patented Aug. 4,1868.

wf/Waff' e 5M MTNESSLS N.`FEKERS. PHOTO-L THOGRAPH HENRY IE. W-HEELE'R0Fl5OSTON,"MASSACHUSETT.SZ

Letters Patent No. 80,792, dated August 4, 1868.

`Ilii-PltC-)VD NUT-SQUARING GHUGK..

@la c'grhule referrer it iii itesefrtttts ttmt mit making tritt at ttetime.

.TO ALL WHOM AIT MAYUCONCERN:

Be it known that L'HLNRY F. WHEELER, of Boston, in the county ofSuffolk,rand State 'of Massachusetts, p

have invented an Improved Nut-Squari-ng Chuck; and I-do hereby declarethat the following, taken in'connection with the drawings whichaccompany and form'part of this specification, is a description of' myinvention sufficient to enable those'skilled in the art to practise it.i I

After nut-blanks are forged or punched, screw-threads' are formedtherein, and all the surfaces ofthe nuts afterwards -finished areintended to bear definite and positive relations to the'axial line ofthe lsrew-threaded hole. One end, at leasthof each nut is intended tobe'square to said axial line, and, heretofore, the screw? threaded butotherwise'rongh blank has been screwed up'on a sqnare-threaded chuck,having a fixed collar, with a face made square to the axis on which thechuck (rotates. But as the endfa'ces of a rough blank Vare by no meanstrue and. square with theaxis of the screw-threaded hole formed therein,oneend of the nut bearslagainst thefixed collar of the chuck only'uponone side, or at one point, and thus, when there is the least play orfreedom between the threads of the chuck and the threads of thenut-blank, it follows that, when the nut-hlank is screwed upon thechuck, hard against the collar thereon, the nut-blankv is crowded to oneside, so that its threads are not truly concentric with the axis ofrotation of the chuck, and hence, 4when the cutting-'tool is madetol-operate'on the end ofthe nut, said end is not made square with itsaxial line, and, when the nut is reversed upon the chuck,

its faced end comes against the fixed collar on the chuck, and the otherend will he made parallel with the end first faced.

Where exactness in the construction of nuts has been required, it hasbeen the practice to screw them upon arbors scretwthreaded and slightlytaper, until the taper of the arbor caused the nut to bind thereuponsuficiently to prevent the turning of the'nut under the action of thetool used for squaring up one end-face. But the operation .of screwingthc nuts upon and oli' from the screw-threaded taper arbor consumes timeunnecessarily, and is'apt to enlarge or stretclithe nut. l

The object of my invention is to facilitate and expedite the Yoperationof squar'ing up `the endsof nuts, and

to render it certainy that the inequalities or lack of perfect form ofthe lends of 'a nut-blank, with reference to the threaded hole therein,shall not canse the nut-blank to assume a distorted position upon' thechuck, on which the ends are'faced, and my invention consists in the'construction of a. chuck, substantially as describedfbywhich the properposition ofia. nation its chuck shall be secured,'so as to rendercertain squareness of the ends of a nut with the axis of its threadedhole. i

`The drawings are un illustration of a chuck embodying my inventionyFigure l showing said chuck partly in longitudinal elevation, and partlyin section.

'Figure 2 being a sectional end elevation of the chuck.

The end a ofthe chuck is threaded, so as to screw into a revolvingspindle, till they collar abuts against the end of said spindle,thecollar being flattened on opposite sides, to permit the applicationof a wrench. The other end,.e, ofthe chuck is made with screw-threadsfitting and correspondingto the threads :formed lin the nut-blankswhich'are to bevond-'faced thereon'.1 VThis end c is montised through,and the piece d is pivoted in the mortise 'on the pin e, so that piece dcan move freely on said pin, the piece d forming the shoulder againstwhich one end of each nut bears, whilst the otherxe'nd is subjected tothe operationfof'a cutting-tool.

Itnwill be seen that, if one' side of the end of a nut-blankfwhenscrewed upon the end .c of the chuck,v touches'one end of the piece cl,before the otli'er side touches the other end of said piecethen thepiece d will` move ou its pivot, till beth ends of said piece bearfairly against opposite sides of the adjacent end-face. of the nut,which, in such case, will not bc crowded to-one side or the other, butwill beheld firmly on the chuck, with its lthreads concentric with theaxis of the chuck. .A

It is not, however, necessary, in order to embody the gist of myinvention, that the "movable shoulder d,

which checks and holds the nut againstthe action of the horingtool,should be of the exact'form shown, or'

located in a mortise throughthe chuck, as described, as the movableshoulder may be otherwise applied, it being sufficient for theembodiment 4of my invention that the shoulder is arranged *to yield toside pressure, so as to take a bearing on.the fa-ce or end of a nut atnearly opposite points. 4

I claim a chuck, for the purpose'described, as made with thescrew-threaded ende, provided with a movable shoulder, d, arranged tooperate substantially as set forth.

H. VF. WHEELER.

Witnesses:

J.4 B. CROSBY, FRANCIS GOULD.

